Hi,

with the last dovecot version (2.3.13) I see many of this warnings via "doveadm log errors":

Feb 17 03:26:28 Warning: dict(31513): conn unix:dict (pid=31330,uid=95): dict(mysql)email1@company1.com: sqlpool(mysql): Query failed, retrying: MySQL server has gone away (idled for 679 secs) Feb 17 03:48:53 Warning: dict(31013): conn unix:dict (pid=31805,uid=95): dict(mysql)email2@company2.com: sqlpool(mysql): Query failed, retrying: MySQL server has gone away (idled for 685 secs) Feb 17 03:54:12 Warning: dict(32529): conn unix:dict (pid=3147,uid=95): dict(mysql)email3@company3.com: sqlpool(mysql): Query failed, retrying: MySQL server has gone away (idled for 670 secs)

What do they mean?

I thinks are related to inactivity timeout on mysql server (where I have a wait_timeout=600), but these warnings could be problems or can be fixed with some setting in dovecot?

My dovecot configuration about dict:

dict {   acl = mysql:/etc/dovecot/dovecot-dict-sql.conf.ext   expire = mysql:/etc/dovecot/dovecot-dict-sql.conf.ext   sieve = mysql:/etc/dovecot/dovecot-dict-sieve-sql.conf.ext   sqlquota = mysql:/etc/dovecot/dovecot-dict-sql.conf.ext } plugin {   [...]   acl_shared_dict = proxy::acl   expire_dict = proxy::expire   quota2 = dict:Quota Usage::noenforcing:proxy::sqlquota   sieve = file:~/sieve;active=~/.dovecot.sieve   sieve_before = dict:proxy::sieve;name=activesql   [...] } service dict {   process_limit = 500   unix_listener dict {     group = vmail     mode = 0660     user = vmail   } }

Thanks